Operator - Map

 Operator  -  Transforn one Observable to another.



Map

1. Basic Calculation

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import io.reactivex.Observable;

public class HomeClass {

    public static void main(String[] args){

        fakeUserInputWithMap().subscribe(System.out::println);
    }

    public static Observable<Integer> fakeUserInputWithMap(){
        return Observable.just(1, 2, 3, 4).
                map(x -> x*10);
    }
}

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2. Random Number

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import io.reactivex.Observable;
import java.util.Random;

public class HomeClass {

    public static void main(String[] args){

        fakeUserInputWithMapRandom().subscribe(System.out::println);
    }

    public static Observable<Integer> fakeUserInputWithMapRandom(){
        Random random = new Random();
        return Observable.just(1, 2, 3, 4).
                map(x -> random.nextInt(20));
    }
}

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